Whenever a conventional planetary gearhead is mounted to a electric motor, the sun gear must be aligned to compensate for runout error of the servomotor shaft. Without proper alignment, load can be unevenly distributed over the planetary gears and the drive teach operates less easily. Also, gear life can be shortened. These alignment adjustments require skills that aren’t normally obtainable in the field.
Achieving a larger speed reduction ratio takes a smaller sun equipment diameter (or an exceptionally large ring equipment). This smaller sun gear is usually integral with its shaft, which must be smaller as well, thereby reducing its strength and its torque or load capacity.

Various kinds gear trains, including those with planetary gears, are generally used to acquire this maximum reduction ratio. Planetary equipment trains offer high stiffness and low backlash (necessary for accurate operation), plus also load distribution (to obtain optimum torque). Some planetary variations combine external-tooth pinion-and-gear sets with planetary gear sections to simplify installation and boost swiftness. These hybrid gearheads are referred to later.
A simple planetary gearhead has several limitations regarding simple installation, load capacity, and speed, all of which are related to the sun gear.

Generally, the designer usually obtains the optimum speed reduction ratio by matching the inertia of the electric motor and gearbox with the inertia of the driven load. This inertia matching minimizes power reduction in the motor, which makes it run more efficiently.

Servo motors deliver precise control of placement, velocity, and acceleration in the closed-loop systems of servomechanisms. Servo motors require a servo drive – this uses the feedback data to precisely control the position of the motors path and rotation distance.
Cone Drive’s stainless precision movement gearboxes are designed for sterile manufacturing environments. The product’s smooth surface and curved contour servo reducer allows for easy cleaning and bacteria-free surfaces, perfect for meals digesting and pharmaceutical applications. The product is designed and ranked to IP69k offering maximum security against contaminant ingress and also leak free operation.
Servomotor selection usually begins with the designer seeking to reduce the motor size by utilizing a gearbox to lessen speed and enhance torque. Speed decrease allows rapid acceleration and deceleration of large loads utilizing a small, less costly motor.